[Q&A] Rings Around Stars, Laser Space Propulsion, Life on Cold Moons

How do we determine the velocities of objects in distant space? Can we use a laser a space engine on a spaceship? Can we find stars with rings? Is it possible to see the same star at different stages of its life? All this and more in this week's Q&A. 🦄 Support us on Patreon: https://patreon.com/universetoday 00:00 Start 02:21 [Tatooine] Can stars have rings? 07:59 [Coruscant] Can we see stars at different life stages with gravitational lensing? 11:29 [Hoth] Why not launch payloads from orbit? 14:30 [Naboo] What would happen if time stopped? 16:20 [Kamino] Does Elon/Twitter impact spaceflight confidence? 18:28 [Bespin] How can there be life on cold moons? 22:49 [Mustafar] What if a meteor hits the Moon while astronauts are there? 25:58 [Alderaan] Shouldn't ETs be benevolent like Vulcans and not malevolent like Klingons? 27:51 [Dagobah] How do we determine the speeds of objects in space? 30:06 [Yavin] Why go back to the Moon? 32:08 [Mandalore] Do you ever get tired of speculating and not lending your intellect to progress? 34:14 [Geonosis] Wen JWST Deep Field? 35:20 [Corellia] Why is Sag A disk not aligned with the galaxy? 37:23 [Crait] Will there be a Mars colony this century? 39:43 [Endor] Could we use a laser as an engine on a spaceship? 📺 VIDEO VERSION https://youtu.be/DM4pfPHS_R0 📰 EMAIL NEWSLETTER Read by 55,000 people every Friday. Written by Fraser. No ads. Subscribe. It's FREE: https://universetoday.com/newsletter 🎧 PODCASTS Universe Today: https://universetoday.fireside.fm/ Weekly Space Hangout: https://www.youtube.com/channel/UC0-KklSGlCiJDwOPdR2EUcg/ Astronomy Cast: http://www.astronomycast.com/ 🤳 OTHER SOCIAL MEDIA Twitter: https://twitter.com/fcain Twitter: https://twitter.com/universetoday Facebook: https://facebook.com/universetoday Instagram: https://instagram.com/universetoday 📩 CONTACT FRASER frasercain@gmail.com ⚖️ LICENSE Creative Commons Attribution 4.0 International (CC BY 4.0)